Is new pop superstar Ke$ha getting close to one of her producers? The singer, whose album “Animal” just debuted at No. 1 on the Billboard 200 while her single “Tik Tok” was a smash hit on both sides of the Atlantic, was spotted getting close to DJ Skeet Skeet at Greenhouse on Tuesday night. Skeet had remixed “Tik Tok.” A source said, “He was in the DJ booth and she came to the club to hang out with him. It looked pretty flirty.” A rep for Ke$ha, whose real name is Kesha Sebert, said, “Ke$ha was there with him, but no hooking up — they are good friends and have worked together.”